931924991 has 2 divisors, whose sum is σ = 931924992. Its totient is φ = 931924990.

The previous prime is 931924967. The next prime is 931924993. The reversal of 931924991 is 199429139.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-931924991 is a prime.

Together with 931924993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (931924993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 465962495 + 465962496.

It is an arithmetic number, because the mean of its divisors is an integer number (465962496).

Almost surely, 2^931924991 is an apocalyptic number.

931924991 is a deficient number, since it is larger than the sum of its proper divisors (1).

931924991 is an equidigital number, since it uses as much as digits as its factorization.

931924991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 931924991 is about 30527.4465194847. The cubic root of 931924991 is about 976.7730144044.

The spelling of 931924991 in words is "nine hundred thirty-one million, nine hundred twenty-four thousand, nine hundred ninety-one".